Fix GetBindInfo() from DeviceContextVkImpl.cpp returning unexpected PIPELINE_TYPE_INVALID.

Author: hzqst

Tests/DiligentCoreAPITest/src/PipelineResourceSignatureTest.cpp

@@ -771,6 +771,15 @@ TEST_F(PipelineResourceSignatureTest, ImmutableSamplers2)
         PipelineResourceSignatureDesc Desc;
         Desc.Name         = "ImmutableSamplers2 - PRS3";
         Desc.BindingIndex = 3;
+
+        //Note that PipelineTypeFromShaderStages() will return PIPELINE_TYPE_INVALID if we leave Desc.Resources empty,
+        //which will lead to PIPELINE_TYPE_INVALID from CmmoitShaderResources() -> pResBindingVkImpl->GetPipelineType()
+        //and causing assert or crash essentially.
+        const PipelineResourceDesc PlaceholderResource[] = {
+            {SHADER_TYPE_VERTEX, "Placeholder", 1, SHADER_RESOURCE_TYPE_CONSTANT_BUFFER, SHADER_RESOURCE_VARIABLE_TYPE_STATIC}
+        };
+        Desc.Resources    = PlaceholderResource;
+        Desc.NumResources = _countof(PlaceholderResource);
         pDevice->CreatePipelineResourceSignature(Desc, &pSignature3);
         ASSERT_NE(pSignature3, nullptr);
     }